Ken Griffin acquired 77.9 Thousand United Therapeutics shares worth $18.4 Million. That's 0.02% of their equity portfolio (830th largest holding). The first United Therapeutics trade was made in Q2 2013. Since then Ken Griffin bought shares 48 more times and sold shares on 51 occasions. The stake costed the investor $9.82 Million, netting the investor a gain of 87% so far.